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G. W. KEYSER.

ROLLER SKATE. Y, No.130'7.,558. Patented Nov. 4, 1884.

N4 PETERS. Photoinhngmplw. wnshmgmn. D. C.

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GEORGE WV. KEYSER, OF INDIANAPOLIS, INDIANA.

ROLLER-SKATE.

MCIFICATION forming part of Letters Patent No. 307,553, dated November 4, 1884.

Application filed June 5, 1884.

llo all whom may 007206771/ Be it known that I, GEORGE W. Knysna, a resident of Indianapolis, Marion county, Indiana, have made certain new and useful Improvements in Roller-Skates, a description of which is set forth in the following specification, reference being made to the accompanying drawings, in the several rgu res of which like letters indicate like parts.

My improvement relates to the construction ofthe wheel-frames of roller-skates, and is au improvement upon a former device invented by me and shown in my application for Let. ters Patent filed March 19, of the present year.

, In the drawings, Figure l is a side View of my device, and Fig. 2 is an end view, a por' tion vof one wheel being cut away to show the oil-channels for lubricating the axle.

In detail f is the foot-plate, to the under side of which is attached the frame-work composed of parts l, 2, and 3, all made in one piece, and adapted to surround the rubber spring-block 7'. The loose rockenbar p forms the under or fourth side of this frame-work, as described in my former application. This rocker-bar has a bearing in the'part l in front and moves -in an open slot in the part2in the rear, and a setscrew, s', passing through the head of this rocker-bar, loosely engages with a thread formed in an opening in a projection, p, of the framework, so that by means of this set-screw a greater or less pressure may be brought to bear upon the rubber block by (No model.)

means of the rocker-bar p',- but the elasticity of this rubber r is not enough, as a very great strain is brought upon all parts of the caster in skating; hence I provide an additional spring of coiled wire, sp, which surrounds the adjustingscrew, and this spring is compressed by the tightening` and lengthened by theloosening of the set-screw s. The adaptation of the parts to receive this spring and its attachment is a great'improvement, as the parts are held more rinly and there is more elasticity under considerable pressure than where but one spring (the rubber) is used. rIhe caster thus made combines strength, elasticity, lightness, and beauty of finish, and is well adapted to undergo great strains in use.

That I claim, and desire to secure by Letters Patent, is the following, viz:

1. The combination, in awcaster for rollerskates, of the frame-work l 2 3, the rubber core r, inclosed therein, the adjustable rocker-bar p', set-sorew s', coiled spring sp, the yoke 1 foot-platef, wheels w, and axles, substantially as described.

2. The frame-work l 2 3, adjustable rockerbar p', rubber 1', set-screw s', spring sp, and

the axle and wheels of` a skate, substantially 6o as described.

NVitness my hand May 26, 1884:.

GEO. XV. KEYSER. litnesses C. P. Jnoons, BENJ. C. lVRrGi-Ir. 

